SM UB-40

	SM UB-45 a U-boat similar to UB-40
History
German Empire
Name	UB-40
Ordered	22 July 1915
Builder	Blohm & Voss, Hamburg
Cost	1,152,000 German Papiermark
Yard number	264
Launched	25 April 1916
Completed	18 August 1916
Commissioned	17 August 1916
Fate	Scuttled during the retreat from Belgium, 5 October 1918
General characteristics
Class and type	Type UB II submarine
Displacement	274 t (270 long tons) surfaced; 303 t (298 long tons) submerged;
Length	36.90 m (121 ft 1 in) o/a; 27.90 m (91 ft 6 in) pressure hull;
Beam	4.37 m (14 ft 4 in) o/a; 3.85 m (12 ft 8 in) pressure hull;
Draught	3.69 m (12 ft 1 in)
Propulsion	1 × propeller shaft; 2 × 6-cylinder diesel engine, 284 PS (209 kW; 280 bhp); 2 × electric motor, 280 PS (210 kW; 280 shp);
Speed	9.15 knots (16.95 km/h; 10.53 mph) surfaced; 5.81 knots (10.76 km/h; 6.69 mph) submerged;
Range	6,450 nmi (11,950 km; 7,420 mi) at 5 knots (9.3 km/h; 5.8 mph) surfaced; 45 nmi (83 km; 52 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged;
Test depth	50 m (160 ft)
Complement	2 officers, 21 men
Armament	2 × 50 cm (19.7 in) torpedo tubes; 4 × torpedoes (later 6); 1 × 8.8 cm (3.5 in) Uk L/30 deck gun;
Notes	42-second diving time
Service record
Part of:	Flandern Flotilla; 10 March 1916 – 2 October 1918;
Commanders:	Oblt.z.S. Karl Neumann; 17 August – 2 December 1916; Oblt.z.S. Hans Howaldt; 3 December 1916 – 14 December 1917; Oblt.z.S. Karl Dobberstein; 15 December 1917 – 17 May 1918; Oblt.z.S. Hans Joachim Emsmann; 18 May – 31 July 1918;
Operations:	28 patrols
Victories:	99 merchant ships sunk ; (129,330 GRT); 1 auxiliary warship sunk ; (6,287 GRT); 16 merchant ships damaged ; (60,629 GRT); 1 merchant ship taken as prize ; (470 GRT);

SM UB-40^{[Note 1]} was a German Type UB II submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I.

^ ^a ^b Rössler 1979, p. 64.
^ ^a ^b ^c Gröner 1991, pp. 23–25.
^ ^a ^b ^c Rössler 1979, p. 65.
^ Helgason, Guðmundur. "WWI U-boat commanders: UB 40". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 8 December 2014.

Cite error: There are <ref group=Note> tags on this page, but the references will not show without a {{reflist|group=Note}} template (see the help page).

[FOOTNOTERössler197964-1] Rössler 1979, p. 64.

[FOOTNOTEGröner199123–25-2] Gröner 1991, pp. 23–25.

[FOOTNOTERössler197965-3] Rössler 1979, p. 65.

[UB40-4] Helgason, Guðmundur. "WWI U-boat commanders: UB 40". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 8 December 2014.

[1]

[2]

[3]

[4]

[Note 1]

History
SM UB-45 a U-boat similar to UB-40
German Empire
Name	UB-40
Ordered	22 July 1915^[1]
Builder	Blohm & Voss, Hamburg^[1]
Cost	1,152,000 German Papiermark^[2]
Yard number	264^[3]
Launched	25 April 1916^[3]
Completed	18 August 1916^[3]
Commissioned	17 August 1916^[2]
Fate	Scuttled during the retreat from Belgium, 5 October 1918^[2]
General characteristics
Class and type	Type UB II submarine
Displacement	274 t (270 long tons) surfaced 303 t (298 long tons) submerged
Length	36.90 m (121 ft 1 in) o/a 27.90 m (91 ft 6 in) pressure hull
Beam	4.37 m (14 ft 4 in) o/a 3.85 m (12 ft 8 in) pressure hull
Draught	3.69 m (12 ft 1 in)
Propulsion	1 × propeller shaft 2 × 6-cylinder diesel engine, 284 PS (209 kW; 280 bhp) 2 × electric motor, 280 PS (210 kW; 280 shp)
Speed	9.15 knots (16.95 km/h; 10.53 mph) surfaced 5.81 knots (10.76 km/h; 6.69 mph) submerged
Range	6,450 nmi (11,950 km; 7,420 mi) at 5 knots (9.3 km/h; 5.8 mph) surfaced 45 nmi (83 km; 52 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth	50 m (160 ft)
Complement	2 officers, 21 men
Armament	2 × 50 cm (19.7 in) torpedo tubes 4 × torpedoes (later 6) 1 × 8.8 cm (3.5 in) Uk L/30 deck gun
Notes	42-second diving time
Service record^[4]
Part of:	Flandern Flotilla 10 March 1916 – 2 October 1918
Commanders:	Oblt.z.S. Karl Neumann 17 August – 2 December 1916 Oblt.z.S. Hans Howaldt 3 December 1916 – 14 December 1917 Oblt.z.S. Karl Dobberstein 15 December 1917 – 17 May 1918 Oblt.z.S. Hans Joachim Emsmann 18 May – 31 July 1918
Operations:	28 patrols
Victories:	99 merchant ships sunk (129,330 GRT) 1 auxiliary warship sunk (6,287 GRT) 16 merchant ships damaged (60,629 GRT) 1 merchant ship taken as prize (470 GRT)